I was the same with DD. I didn't see the point in just going out for the sake of it. It's boring, it gives me no pleasure, especially on my own with a baby. We did some groups, but neither of us got much from it that we wouldn't at home without the hassle.
My mental health was fine. Being at home was fine and I enjoyed .
Once she was about one and a half I made an effort to befriend people,have playdates, go places etc.
At 2 and a half she started preschool and our social circle expanded even more. More playdates,more meetups, birthday parties, visiting friends for a week as mini holidays, family holidays etc
Now she's 9 , very sociable,kind ,friendly and kids and grownups love her.
There's this obsession with going out daily because it improves mental health. 1.Not everyone is the same 2.if your mental health is fine, what is there to improve?
Even worse, there's an obsession with going for a walk just because,you must,you should. "Oh just go around the block" Why? Just why? Just so you can say I've been for a walk today? Completely pointless, and not that enjoyable for some people.
As long as you don't get stuck in the mindset you are now and you evolve and develop alongside her , you'll both be fine.